Cutter-head



L. S. HALL.

CUTTER HEAD.

APPLICATION FILED 050.16.1919.

Patented July 12, 1921.

5 SHEETS SHEET.I-v

IIIIIIIL WM HM W Z L. S. HALL,

CUTTER HEAD.

APPLICATION FILED Dc.16. 1.9m.

Patented July 12, 1921.

5 SHEETSSHEET 2.

L. S. HALL.

CUTTER HEAD- APPLICATION min nzc. 16. 1919.

Patented July 12, 1921.

5 SHEETS-SHEET 3- IIIIIII L. S. HALL.

CUTTER HEAD.

APPLICATION r1150 050.16. 1919.

Patented July 12, 1921.

5 SHEETS-SHEET L. S. HALL.

CUTTER HEAD.

APPLICATION FILED DEC. 161 1919.

1,384,524. Patented July 12, 1921.

" 5 SHEETS-SHEET 5.

UNITED STATES PATENT onnes.

LESLIE SAMUEL HALL, OF BRANTFORD, ONTARIO, CANADA.

CUTTER-HEAD.

To all whom it may concern. 1

Be it known that I, LESLIE SAMUEL HALL, a subject of the King'of Great Britain, and resident of Brantford, inthe Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Cutter-Heads, of which the following is a specification.

This invention relates to improvements in cutterheads, and particularly of the type used for cutting and screwing thereto pipes in which a plurality of radially movable cutterheads are employed, and the objects of the invention are generally to improve and simplify the construction to better adapt the various parts to perform the functions required of them.

It consists essentially of the improved construction, hereinafter described in detail in the accompanying specification and drawings.

In the drawings;

Figure 1 is a front or end view, partly in section of the cutterhead.

' Fig. 2 is a side view.

Fig. 3 is a sectional elevation of one of the T chaser holders.

Fig. 4 is a detail elevation of the supporting head for the chaser holders.

Fig. 5 is a sectional elevation taken along the line 5-5 of Fig. 3.

Fig; 6 is a sectional view taken along the line 6-6 of Fig. 3, with the cam roller and supporting stud removable.

Fig. 7 1s a sectional view along the line 7-7 of Fig. 3.

Fig. 8 is a sectional elevation showing in detail the adjusting or controlling mocha-- nism.

Fig. 9 is a sectional end view of the mecha nism shown in Fig. '8.

Fig. 10 is a detail end view of the adjustable stop. a

Fig. 11 is a side view of the mechanism shown in Fig. 10, taken at right angles to Fig. 10. A

Fig. 12 is a sectional detail of the end of the bolt on the locking device shown in Fig. 13.

Fig. 13 is a sectional detail showing the clamping or locking mechanism.

Fig. 14 is an elevation showing the retaining ring.

Fig. 15 is a sectional view through the retaining ring.

Specification of Letters Patent.

Application filed December 16, 1919.

Patented July 12, 1921.

Serial No. 345,438.

Fig. 16 is a sectional elevation showing the oil feeding and clamping arrangement.

In the drawings, like characters of reference refer to like parts in the several figures.

Referring to the drawings, A represents the head having a plurality of radially movable cutter or chaser holders B, each of which carry bearing pins 10, on which the swivel rollers or cam bearing slides 1O move in the spiral cam groove 12 in a con trolling ring (1, the arrangement being such as commonly used in the art, whereby when the cam C is turned relatively to the head A, the cutter-holder B will be moved inwardly or outwardly, being guided in their movement by dove-tailed tongues 13 engaging the corresponding grooves 14 in the head.

The cam ring C is made to rotate on a stationary bearing and retaining ring bolted rigidly to head A which provides a bpfaring for C and also prevents it coming 0 The turning movement of the cam ring C with respect to the; head is accomplished by the mechanism shown in detail in Figs. 8 and 9, comprising a bracket 15, journaling a shaft 16, having a pinion 17 fiXed thereto at one end, and engaging a rack 18 on the ring C, the opposite end of the shaft 16 carrying a worm gear 19, which engages the worm 20 on a cross shaft 21, also journaled in a lug 22 in the bracket, extending substan: tially at right angles to the shaft 16, having a hand wheel 23 at one end.

The circumferential or angular adjust ment between the body A and the ring C may be indicated by indexed pointers 23 on the head, adapted to cooperate with the scale 24 on the ring.

It will be seen that when the handle 23 is turned, it will turn the worm 20 the worm wheel 19, turning the shaft 16, which through the pinion 17 will move .the' rack 18, the latter being secured to the ring C will move the same.

Exact limitations of the adjustment are provided for by means of the stop shown in Figs. 10, 11 and 12, which stop includes a bracket 241 bolted to the head A having a lug 25 through which a stop screw 26 extends, having at the outer end a recess head 27 by which it may be conveniently turned, the inner end constituting a stop adapted cl-amped in any position to head A by clamp D including a'pin 34 with an enlarged head 35 on one end, mounted with freedom to rotate in the recess 36w1th ring C, the end of which pin 34 is screw threaded and provided with a clamping nut 37 adapted, to bear against the head A and having a handle 38 thereon by which it may be conveniently turned.

The cutterholders B move radially in suit able'guideways 40, which will be accomplishedby means already described' Each cutterholder at its lower extremity is pro vided with a recess 41 adapted to receive a chaser 42 fitted to rest thereon, the inner end of the recess 41 forming beveled abutmcnts 43 for the correspondingly extended beveled end on the chaser 42. The lower edge of the chaser is formed with suitable cutting teeth 44 after the manner wellknown in the art.

The chaser is heldin the recess by means of a clamping member-45 fitted withina re- V cess 46 and having a foot 47 bearing against the: outer surface of the chaser and adapted to be firmly held against the same by'means of one or two bolts 48, which extend through the cutterholder, the nuts on the said bolts being adapted to bear against the abutment surfaces 49 forming one side of a central perforation 50 in the cutterholder, the cutterholder itself is on the upper part formed with a'further perforation 51 to reduce the weight of the metal.

Provision is made for oiling the chaser, and worked by means of'an oil passageway 52 extending longitudinally in the cutterholderopening on the outer endinrecesses 53, and at the inner end in a transversely extending passageway 54, which engages with outlet ports 55, from which the oil is discharged. V r

The port 53 in whatever position thercutterholdermay be, is adapted to communicate with .an oil supply port 56, which in turn engages with a: circumferentially ex tending oil supply passageway 57,'formed in the head A, and supply oil from any convenient source, through a suitable inlet passageway 58. j

It will be seenthat asthe chaser 42 is of beveled edge 43 forms an abutment which takes considerable of the strain from the clamp 45.

As many changes could be made in the above construction, and many, apparently widely different embodiments of my invention, within the scope of the claims, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim "as my invention is 1. In a cutter head or the like, a cutter holder having a.recess with a beveled edge formed by two plane surfaces meeting at an acute angle, a chaser adapted to fitfthe recess and also-having a beveled edge coacting with the said edge, clamping means engaging the outer face of the chaser and provided with a foot bearing against the chaser holder and held withinthe recess in the cutter head, and means for moving the cutter holder radially. r

2. In a cutterhead, the combinationwith a head, having a circumferential oil passage with suitable, outlet ports, of a plurality of radially movable cutterholder-s, each formed with longitudinally extending oil passage ways, having outlet ports ada'ptedin any position to communicate with the port in the circumferential oil passageway in the head and means for moving the cuttertholders simultaneously radially.

3. Ina cutterhead, in combination, a head having radial grooves, a plurality of cutterholders movable in the. grooves, a ring, means whereby movement of the ring relative to the head moves the cutterholder inwardly or outwardly, a bracket on the head,

posite end of the shaft, a rack on the ring engaging the pinion, a shaft extendingtrans versely to the first mentioned shaft, and suitably journaledin the said bracket, a worm on the said last mentioned shaft engaging the worm wheel, and means for turning the said last mentioned shaft; i 3

In witness whereof I have hereunto set my WVitnesses:

' DOROTHY COOPER, JAMES HARLEY. 

